so, I'm wondering what does changing the priority actually do -aside from the fact, that you get packages offered...or what is different with these packages in regards to packages I would get when they are with priority 600?

Hi All,Attached is a list of the errors I am having whilst trying to do an update, I have modified the Pin priority to 500 still getting errors at the end of apt-get upgrade and apt-get update any help would be very much appreciated.....stuck in a rut